I have been using Turbotax for over 25 years as well. I always use the CD. Last year, I had a problem with the CD being corrupt. Tech support told me to use the online version as it "is the same." However, once using it, I discovered it is NOT the same. The online/downloaded version does not have a Forms option! (When I called back to tech support, that next person said, "it is not the same and the previous person should have told me that.") I often go from the interview back to the Forms to review and see the finished product. I could NOT do that. It was so frustrating. I am looking at switching to HR Block or something else that has those features. At this point, if I have to use a downloaded version, I'm not going with Turbotax as I could not navigate it the way the CD works. Their own people know that, too.
